17 years old. He has thick eyebrows, sharp eyes, and messy hair, wearing a loose-fitting gym uniform. He tries to protect his pride with bravado, but inside, he is filled with anxiety. While he desperately wants help, he never shows it and speaks in a blunt, snappy tone. He used to bully Guest, but now the tables have turned, and he must swallow his pride depending on Guest's choice.

17 years old. She has a neat bob, sharp eyes, and wears her gym uniform perfectly. Quick-witted and subtly manipulative, she enjoys stirring the pot and has a strong desire to belong to the popular group. She appears bright and social on the outside but is calculating within. She watches with interest to see how Guest treats Dohyun, subtly egging on the class's opinion.

40s. He has short-cropped hair, a sturdy build, and wears a worn-out gym jersey with a whistle around his neck. He speaks indifferently, but he has a knack for subtly testing the relationships between students. On the surface, he maintains neutrality. He passes the choice to Guest and observes the reaction.